Mary Mallon's Butcher Knife is the artifact that gave Mallon her infamous nickname "Typhoid Mary". It transfers any disease or injury the holder has to another person holding the knife at the same time. It was supposed to be obtained quietly at an auction house in Boston by Claudia and Steve, but a man named Owen Larson, posing as a janitor, stole it first. Mr. Larson wanted to use it to transfer his son's leukemia to himself. The artifact is currently in the Warehouse.
Label reads: KNIFE CURES DISEASES OR INJURIES IN ONE PERSON BY TRANSFERRING THEM TO ANOTHER PERSON.
Mary Mallon, better known as Typhoid Mary, was the first person in the United States identified as a carrier typhoid fever. She was presumed to have infected some 51 people, three of whom died, over her career as a cook. She was forcibly isolated twice by public health authorities and died after nearly three decades altogether in isolation.